Isafuyu (諫冬, Isafuyu) (or Isa-chan as Aoi calls her) is the daughter of a priest of the Mapputatsu Temple, where she lives and works as a priestess.Isafuyu is a short petite girl who often dresses in her priestess clothes. She has purplish-red hair tied in two loose pigtails and matching eyes.Isafuyu is very shy. She also appears naive and innocent, answering the perverted questions that Koma asks her without appearing bothered by them (she simply states that they're just personal things).Isafuyu has known Aoi for a certain period of time and have become seemingly close, as shown by how they refer to one another with "-chan" suffixes.
Beelzebub
Ishiyama High is a school populated entirely by delinquents, where nonstop violence and lawlessness are the norm. However, there is one universally acknowledged rule—don't cross first year student Tatsumi Oga, Ishiyama's most vicious fighter. One day, Oga is by a riverbed when he encounters a man floating down the river. After being retrieved by Oga, the man splits down the middle to reveal a baby, which crawls onto Oga's back and immediately forms an attachment to him. Though he doesn't know it yet, this baby is named Kaiser de Emperana Beelzebub IV, or "Baby Beel" for short—the son of the Demon Lord! As if finding the future Lord of the Underworld isn't enough, Oga is also confronted by Hildegard, Beel's demon maid. Together they attempt to raise Baby Beel—although surrounded by juvenile delinquents and demonic powers, the two of them may be in for more of a challenge than they can imagine.
